it doesnt matter if you chip it yourself or what, its the program that matters, dont listent o people put down ebay chips cause they never used them, they are working off of word of mouth. getting a chip off ebay from spoon is the same as gettin his precious uberdata, a programer and a blank chip and loading the program on the chip yourself. jdm diffrence in d16z6 is very slight, with maybe diffrent pistons, JDM is mostly looks until you get to b series, which they will give you more horses IF and ONLY IF you use high octain 91+, the reason a JDM gets more horses is because its made to use higher octaine, so it has a little higher compression and slightly diffrent program, but it wont do you any good getting a jspec motor and use 87-89 octaine